28488980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:193

約数の個数: 96

約数和(自身を含む): 69619200

約数和(自身を除く): 41130220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 73, 76, 79, 95, 130, 146, 158, 190, 247, 260, 292, 316, 365, 380, 395, 494, 730, 790, 949, 988, 1027, 1235, 1387, 1460, 1501, 1580, 1898, 2054, 2470, 2774, 3002, 3796, 4108, 4745, 4940, 5135, 5548, 5767, 6004, 6935, 7505, 9490, 10270, 11534, 13870, 15010, 18031, 18980, 19513, 20540, 23068, 27740, 28835, 30020, 36062, 39026, 57670, 72124, 74971, 78052, 90155, 97565, 109573, 115340, 149942, 180310, 195130, 219146, 299884, 360620, 374855, 390260, 438292, 547865, 749710, 1095730, 1424449, 1499420, 2191460, 2848898, 5697796, 7122245, 14244490, 28488980]

約数ペア:

[(1, 28488980), (2, 14244490), (4, 7122245), (5, 5697796), (10, 2848898), (13, 2191460), (19, 1499420), (20, 1424449), (26, 1095730), (38, 749710), (52, 547865), (65, 438292), (73, 390260), (76, 374855), (79, 360620), (95, 299884), (130, 219146), (146, 195130), (158, 180310), (190, 149942), (247, 115340), (260, 109573), (292, 97565), (316, 90155), (365, 78052), (380, 74971), (395, 72124), (494, 57670), (730, 39026), (790, 36062), (949, 30020), (988, 28835), (1027, 27740), (1235, 23068), (1387, 20540), (1460, 19513), (1501, 18980), (1580, 18031), (1898, 15010), (2054, 13870), (2470, 11534), (2774, 10270), (3002, 9490), (3796, 7505), (4108, 6935), (4745, 6004), (4940, 5767), (5135, 5548)]